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Influence of Polymer Concentration on Polysaccharide Electrolyte for Quasi-Solid-State Dye-Sensitized Solar Cell

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Abstract:

A series of polymer electrolytes was synthesized to fabricate dye-sensitized solar cells by a novel polysaccharide agarose as polymer matrix, 1-methyl-2-pyrrolidinone (NMP) as plasticizers, lithium iodide (LiI)/iodine (I2) as redox couple and titania nanoparticles as an absorber. The agarose polymer electrolytes with different agarose concentrations (1-5 wt %) were systematically studied by differential scanning calorimetry (DSC) and the AC impedance spectra. The photoelectric performances of the DSSCs with different agarose content were investigated. Increasing polymer concentration led to a decrease in Tg of electrolyte in the low content range (1-2 wt %), which results in relative high conductivity in these content ranges. The 1.5 wt % agarose contained electrolyte showed the maximum conductivity of 3.94 ×10-4 S cm-1. After optimization, the energy conversion efficiency of 4.14 % was obtained in the cell with 2 wt % agarose.

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Periodical:

Materials Science Forum (Volume 685)

Pages:

76-81

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.685.76

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Online since:

June 2011

Authors:

Ying Yang, Xue Yi Guo, Xing Zhong Zhao

Keywords:

Agarose, Dye Sensitized Solar Cell (DSSC), Polymer Electrolyte, Quasi-Solid State

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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